Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 52b4284cb496 |
children | 7848fc12602b |
rev | line source |
---|---|
342 | 1 /* |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP | |
27 | |
28 #include "gc_implementation/g1/collectionSetChooser.hpp" | |
29 #include "gc_implementation/g1/g1MMUTracker.hpp" | |
30 #include "memory/collectorPolicy.hpp" | |
31 | |
342 | 32 // A G1CollectorPolicy makes policy decisions that determine the |
33 // characteristics of the collector. Examples include: | |
34 // * choice of collection set. | |
35 // * when to collect. | |
36 | |
37 class HeapRegion; | |
38 class CollectionSetChooser; | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
39 class G1GCPhaseTimes; |
342 | 40 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
41 // TraceGen0Time collects data on _both_ young and mixed evacuation pauses |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
42 // (the latter may contain non-young regions - i.e. regions that are |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
43 // technically in Gen1) while TraceGen1Time collects data about full GCs. |
6197 | 44 class TraceGen0TimeData : public CHeapObj<mtGC> { |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
45 private: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
46 unsigned _young_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
47 unsigned _mixed_pause_num; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
48 |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
49 NumberSeq _all_stop_world_times_ms; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
50 NumberSeq _all_yield_times_ms; |
342 | 51 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
52 NumberSeq _total; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
53 NumberSeq _other; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
54 NumberSeq _root_region_scan_wait; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
55 NumberSeq _parallel; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
56 NumberSeq _ext_root_scan; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
57 NumberSeq _satb_filtering; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
58 NumberSeq _update_rs; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
59 NumberSeq _scan_rs; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
60 NumberSeq _obj_copy; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
61 NumberSeq _termination; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
62 NumberSeq _parallel_other; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
63 NumberSeq _clear_ct; |
342 | 64 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
65 void print_summary(const char* str, const NumberSeq* seq) const; |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
66 void print_summary_sd(const char* str, const NumberSeq* seq) const; |
342 | 67 |
68 public: | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
69 TraceGen0TimeData() : _young_pause_num(0), _mixed_pause_num(0) {}; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
70 void record_start_collection(double time_to_stop_the_world_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
71 void record_yield_time(double yield_time_ms); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
72 void record_end_collection(double pause_time_ms, G1GCPhaseTimes* phase_times); |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
73 void increment_young_collection_count(); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
74 void increment_mixed_collection_count(); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
75 void print() const; |
342 | 76 }; |
77 | |
6197 | 78 class TraceGen1TimeData : public CHeapObj<mtGC> { |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
79 private: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
80 NumberSeq _all_full_gc_times; |
342 | 81 |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
82 public: |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
83 void record_full_collection(double full_gc_time_ms); |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
84 void print() const; |
342 | 85 }; |
86 | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
87 // There are three command line options related to the young gen size: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
88 // NewSize, MaxNewSize and NewRatio (There is also -Xmn, but that is |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
89 // just a short form for NewSize==MaxNewSize). G1 will use its internal |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
90 // heuristics to calculate the actual young gen size, so these options |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
91 // basically only limit the range within which G1 can pick a young gen |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
92 // size. Also, these are general options taking byte sizes. G1 will |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
93 // internally work with a number of regions instead. So, some rounding |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
94 // will occur. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
95 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
96 // If nothing related to the the young gen size is set on the command |
7449 | 97 // line we should allow the young gen to be between G1NewSizePercent |
98 // and G1MaxNewSizePercent of the heap size. This means that every time | |
99 // the heap size changes, the limits for the young gen size will be | |
100 // recalculated. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
101 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
102 // If only -XX:NewSize is set we should use the specified value as the |
7449 | 103 // minimum size for young gen. Still using G1MaxNewSizePercent of the |
104 // heap as maximum. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
105 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
106 // If only -XX:MaxNewSize is set we should use the specified value as the |
7449 | 107 // maximum size for young gen. Still using G1NewSizePercent of the heap |
108 // as minimum. | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
109 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
110 // If -XX:NewSize and -XX:MaxNewSize are both specified we use these values. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
111 // No updates when the heap size changes. There is a special case when |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
112 // NewSize==MaxNewSize. This is interpreted as "fixed" and will use a |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
113 // different heuristic for calculating the collection set when we do mixed |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
114 // collection. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
115 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
116 // If only -XX:NewRatio is set we should use the specified ratio of the heap |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
117 // as both min and max. This will be interpreted as "fixed" just like the |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
118 // NewSize==MaxNewSize case above. But we will update the min and max |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
119 // everytime the heap size changes. |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
120 // |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
121 // NewSize and MaxNewSize override NewRatio. So, NewRatio is ignored if it is |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
122 // combined with either NewSize or MaxNewSize. (A warning message is printed.) |
6197 | 123 class G1YoungGenSizer : public CHeapObj<mtGC> { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
124 private: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
125 enum SizerKind { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
126 SizerDefaults, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
127 SizerNewSizeOnly, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
128 SizerMaxNewSizeOnly, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
129 SizerMaxAndNewSize, |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
130 SizerNewRatio |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
131 }; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
132 SizerKind _sizer_kind; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
133 uint _min_desired_young_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
134 uint _max_desired_young_length; |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
135 bool _adaptive_size; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
136 uint calculate_default_min_length(uint new_number_of_heap_regions); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
137 uint calculate_default_max_length(uint new_number_of_heap_regions); |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
138 |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
139 // Update the given values for minimum and maximum young gen length in regions |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
140 // given the number of heap regions depending on the kind of sizing algorithm. |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
141 void recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length); |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
142 |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
143 public: |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
144 G1YoungGenSizer(); |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
145 // Calculate the maximum length of the young gen given the number of regions |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
146 // depending on the sizing algorithm. |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
147 uint max_young_length(uint number_of_heap_regions); |
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
148 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
149 void heap_size_changed(uint new_number_of_heap_regions); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
150 uint min_desired_young_length() { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
151 return _min_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
152 } |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
153 uint max_desired_young_length() { |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
154 return _max_desired_young_length; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
155 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
156 bool adaptive_young_list_length() { |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
157 return _adaptive_size; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
158 } |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
159 }; |
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
160 |
342 | 161 class G1CollectorPolicy: public CollectorPolicy { |
4013 | 162 private: |
342 | 163 // either equal to the number of parallel threads, if ParallelGCThreads |
164 // has been set, or 1 otherwise | |
165 int _parallel_gc_threads; | |
166 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
167 // The number of GC threads currently active. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
168 uintx _no_of_gc_threads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
169 |
342 | 170 enum SomePrivateConstants { |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
936
diff
changeset
|
171 NumPrevPausesForHeuristics = 10 |
342 | 172 }; |
173 | |
174 G1MMUTracker* _mmu_tracker; | |
175 | |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
176 void initialize_alignments(); |
342 | 177 void initialize_flags(); |
178 | |
4013 | 179 CollectionSetChooser* _collectionSetChooser; |
342 | 180 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
181 double _full_collection_start_sec; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
182 uint _cur_collection_pause_used_regions_at_start; |
890
6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
johnc
parents:
838
diff
changeset
|
183 |
342 | 184 // These exclude marking times. |
185 TruncatedSeq* _recent_gc_times_ms; | |
186 | |
187 TruncatedSeq* _concurrent_mark_remark_times_ms; | |
188 TruncatedSeq* _concurrent_mark_cleanup_times_ms; | |
189 | |
6109
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
190 TraceGen0TimeData _trace_gen0_time_data; |
bbc900c2482a
7172279: G1: Clean up TraceGen0Time and TraceGen1Time data gathering
brutisso
parents:
6059
diff
changeset
|
191 TraceGen1TimeData _trace_gen1_time_data; |
342 | 192 |
193 double _stop_world_start; | |
194 | |
4710 | 195 // indicates whether we are in young or mixed GC mode |
196 bool _gcs_are_young; | |
342 | 197 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
198 uint _young_list_target_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
199 uint _young_list_fixed_length; |
342 | 200 |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
201 // The max number of regions we can extend the eden by while the GC |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
202 // locker is active. This should be >= _young_list_target_length; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
203 uint _young_list_max_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
204 |
4710 | 205 bool _last_gc_was_young; |
342 | 206 |
207 bool _during_marking; | |
208 bool _in_marking_window; | |
209 bool _in_marking_window_im; | |
210 | |
211 SurvRateGroup* _short_lived_surv_rate_group; | |
212 SurvRateGroup* _survivor_surv_rate_group; | |
213 // add here any more surv rate groups | |
214 | |
1356 | 215 double _gc_overhead_perc; |
216 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
217 double _reserve_factor; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
218 uint _reserve_regions; |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
219 |
342 | 220 bool during_marking() { |
221 return _during_marking; | |
222 } | |
223 | |
224 enum PredictionConstants { | |
225 TruncatedSeqLength = 10 | |
226 }; | |
227 | |
228 TruncatedSeq* _alloc_rate_ms_seq; | |
229 double _prev_collection_pause_end_ms; | |
230 | |
231 TruncatedSeq* _rs_length_diff_seq; | |
232 TruncatedSeq* _cost_per_card_ms_seq; | |
4710 | 233 TruncatedSeq* _young_cards_per_entry_ratio_seq; |
234 TruncatedSeq* _mixed_cards_per_entry_ratio_seq; | |
342 | 235 TruncatedSeq* _cost_per_entry_ms_seq; |
4710 | 236 TruncatedSeq* _mixed_cost_per_entry_ms_seq; |
342 | 237 TruncatedSeq* _cost_per_byte_ms_seq; |
238 TruncatedSeq* _constant_other_time_ms_seq; | |
239 TruncatedSeq* _young_other_cost_per_region_ms_seq; | |
240 TruncatedSeq* _non_young_other_cost_per_region_ms_seq; | |
241 | |
242 TruncatedSeq* _pending_cards_seq; | |
243 TruncatedSeq* _rs_lengths_seq; | |
244 | |
245 TruncatedSeq* _cost_per_byte_ms_during_cm_seq; | |
246 | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
247 G1YoungGenSizer* _young_gen_sizer; |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
248 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
249 uint _eden_cset_region_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
250 uint _survivor_cset_region_length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
251 uint _old_cset_region_length; |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
252 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
253 void init_cset_region_lengths(uint eden_cset_region_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
254 uint survivor_cset_region_length); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
255 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
256 uint eden_cset_region_length() { return _eden_cset_region_length; } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
257 uint survivor_cset_region_length() { return _survivor_cset_region_length; } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
258 uint old_cset_region_length() { return _old_cset_region_length; } |
342 | 259 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
260 uint _free_regions_at_end_of_collection; |
342 | 261 |
262 size_t _recorded_rs_lengths; | |
263 size_t _max_rs_lengths; | |
264 double _sigma; | |
265 | |
266 size_t _rs_lengths_prediction; | |
267 | |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
268 double sigma() { return _sigma; } |
342 | 269 |
270 // A function that prevents us putting too much stock in small sample | |
271 // sets. Returns a number between 2.0 and 1.0, depending on the number | |
272 // of samples. 5 or more samples yields one; fewer scales linearly from | |
273 // 2.0 at 1 sample to 1.0 at 5. | |
274 double confidence_factor(int samples) { | |
275 if (samples > 4) return 1.0; | |
276 else return 1.0 + sigma() * ((double)(5 - samples))/2.0; | |
277 } | |
278 | |
279 double get_new_neg_prediction(TruncatedSeq* seq) { | |
280 return seq->davg() - sigma() * seq->dsd(); | |
281 } | |
282 | |
283 #ifndef PRODUCT | |
284 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group); | |
285 #endif // PRODUCT | |
286 | |
1111 | 287 void adjust_concurrent_refinement(double update_rs_time, |
288 double update_rs_processed_buffers, | |
289 double goal_ms); | |
290 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
291 uintx no_of_gc_threads() { return _no_of_gc_threads; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
292 void set_no_of_gc_threads(uintx v) { _no_of_gc_threads = v; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
293 |
342 | 294 double _pause_time_target_ms; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
295 |
342 | 296 size_t _pending_cards; |
297 | |
298 public: | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
299 // Accessors |
342 | 300 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
301 void set_region_eden(HeapRegion* hr, int young_index_in_cset) { |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
302 hr->set_young(); |
342 | 303 hr->install_surv_rate_group(_short_lived_surv_rate_group); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
304 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 305 } |
306 | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
307 void set_region_survivor(HeapRegion* hr, int young_index_in_cset) { |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
308 assert(hr->is_young() && hr->is_survivor(), "pre-condition"); |
342 | 309 hr->install_surv_rate_group(_survivor_surv_rate_group); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
310 hr->set_young_index_in_cset(young_index_in_cset); |
342 | 311 } |
312 | |
313 #ifndef PRODUCT | |
314 bool verify_young_ages(); | |
315 #endif // PRODUCT | |
316 | |
317 double get_new_prediction(TruncatedSeq* seq) { | |
318 return MAX2(seq->davg() + sigma() * seq->dsd(), | |
319 seq->davg() * confidence_factor(seq->num())); | |
320 } | |
321 | |
322 void record_max_rs_lengths(size_t rs_lengths) { | |
323 _max_rs_lengths = rs_lengths; | |
324 } | |
325 | |
326 size_t predict_rs_length_diff() { | |
327 return (size_t) get_new_prediction(_rs_length_diff_seq); | |
328 } | |
329 | |
330 double predict_alloc_rate_ms() { | |
331 return get_new_prediction(_alloc_rate_ms_seq); | |
332 } | |
333 | |
334 double predict_cost_per_card_ms() { | |
335 return get_new_prediction(_cost_per_card_ms_seq); | |
336 } | |
337 | |
338 double predict_rs_update_time_ms(size_t pending_cards) { | |
339 return (double) pending_cards * predict_cost_per_card_ms(); | |
340 } | |
341 | |
4710 | 342 double predict_young_cards_per_entry_ratio() { |
343 return get_new_prediction(_young_cards_per_entry_ratio_seq); | |
342 | 344 } |
345 | |
4710 | 346 double predict_mixed_cards_per_entry_ratio() { |
347 if (_mixed_cards_per_entry_ratio_seq->num() < 2) { | |
348 return predict_young_cards_per_entry_ratio(); | |
349 } else { | |
350 return get_new_prediction(_mixed_cards_per_entry_ratio_seq); | |
351 } | |
342 | 352 } |
353 | |
354 size_t predict_young_card_num(size_t rs_length) { | |
355 return (size_t) ((double) rs_length * | |
4710 | 356 predict_young_cards_per_entry_ratio()); |
342 | 357 } |
358 | |
359 size_t predict_non_young_card_num(size_t rs_length) { | |
360 return (size_t) ((double) rs_length * | |
4710 | 361 predict_mixed_cards_per_entry_ratio()); |
342 | 362 } |
363 | |
364 double predict_rs_scan_time_ms(size_t card_num) { | |
4710 | 365 if (gcs_are_young()) { |
342 | 366 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 367 } else { |
368 return predict_mixed_rs_scan_time_ms(card_num); | |
369 } | |
342 | 370 } |
371 | |
4710 | 372 double predict_mixed_rs_scan_time_ms(size_t card_num) { |
373 if (_mixed_cost_per_entry_ms_seq->num() < 3) { | |
342 | 374 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq); |
4710 | 375 } else { |
376 return (double) (card_num * | |
377 get_new_prediction(_mixed_cost_per_entry_ms_seq)); | |
378 } | |
342 | 379 } |
380 | |
381 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) { | |
4710 | 382 if (_cost_per_byte_ms_during_cm_seq->num() < 3) { |
383 return (1.1 * (double) bytes_to_copy) * | |
384 get_new_prediction(_cost_per_byte_ms_seq); | |
385 } else { | |
342 | 386 return (double) bytes_to_copy * |
4710 | 387 get_new_prediction(_cost_per_byte_ms_during_cm_seq); |
388 } | |
342 | 389 } |
390 | |
391 double predict_object_copy_time_ms(size_t bytes_to_copy) { | |
4710 | 392 if (_in_marking_window && !_in_marking_window_im) { |
342 | 393 return predict_object_copy_time_ms_during_cm(bytes_to_copy); |
4710 | 394 } else { |
342 | 395 return (double) bytes_to_copy * |
4710 | 396 get_new_prediction(_cost_per_byte_ms_seq); |
397 } | |
342 | 398 } |
399 | |
400 double predict_constant_other_time_ms() { | |
401 return get_new_prediction(_constant_other_time_ms_seq); | |
402 } | |
403 | |
404 double predict_young_other_time_ms(size_t young_num) { | |
4710 | 405 return (double) young_num * |
406 get_new_prediction(_young_other_cost_per_region_ms_seq); | |
342 | 407 } |
408 | |
409 double predict_non_young_other_time_ms(size_t non_young_num) { | |
4710 | 410 return (double) non_young_num * |
411 get_new_prediction(_non_young_other_cost_per_region_ms_seq); | |
342 | 412 } |
413 | |
414 double predict_base_elapsed_time_ms(size_t pending_cards); | |
415 double predict_base_elapsed_time_ms(size_t pending_cards, | |
416 size_t scanned_cards); | |
417 size_t predict_bytes_to_copy(HeapRegion* hr); | |
6611 | 418 double predict_region_elapsed_time_ms(HeapRegion* hr, bool for_young_gc); |
342 | 419 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
420 void set_recorded_rs_lengths(size_t rs_lengths); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
421 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
422 uint cset_region_length() { return young_cset_region_length() + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
423 old_cset_region_length(); } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
424 uint young_cset_region_length() { return eden_cset_region_length() + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
425 survivor_cset_region_length(); } |
342 | 426 |
545 | 427 double predict_survivor_regions_evac_time(); |
428 | |
342 | 429 void cset_regions_freed() { |
4710 | 430 bool propagate = _last_gc_was_young && !_in_marking_window; |
342 | 431 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate); |
432 _survivor_surv_rate_group->all_surviving_words_recorded(propagate); | |
433 // also call it on any more surv rate groups | |
434 } | |
435 | |
436 G1MMUTracker* mmu_tracker() { | |
437 return _mmu_tracker; | |
438 } | |
439 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
440 double max_pause_time_ms() { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
441 return _mmu_tracker->max_gc_time() * 1000.0; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
442 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
443 |
342 | 444 double predict_remark_time_ms() { |
445 return get_new_prediction(_concurrent_mark_remark_times_ms); | |
446 } | |
447 | |
448 double predict_cleanup_time_ms() { | |
449 return get_new_prediction(_concurrent_mark_cleanup_times_ms); | |
450 } | |
451 | |
452 // Returns an estimate of the survival rate of the region at yg-age | |
453 // "yg_age". | |
545 | 454 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) { |
455 TruncatedSeq* seq = surv_rate_group->get_seq(age); | |
342 | 456 if (seq->num() == 0) |
457 gclog_or_tty->print("BARF! age is %d", age); | |
458 guarantee( seq->num() > 0, "invariant" ); | |
459 double pred = get_new_prediction(seq); | |
460 if (pred > 1.0) | |
461 pred = 1.0; | |
462 return pred; | |
463 } | |
464 | |
545 | 465 double predict_yg_surv_rate(int age) { |
466 return predict_yg_surv_rate(age, _short_lived_surv_rate_group); | |
467 } | |
468 | |
342 | 469 double accum_yg_surv_rate_pred(int age) { |
470 return _short_lived_surv_rate_group->accum_surv_rate_pred(age); | |
471 } | |
472 | |
4013 | 473 private: |
342 | 474 // Statistics kept per GC stoppage, pause or full. |
475 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec; | |
476 | |
477 // Add a new GC of the given duration and end time to the record. | |
478 void update_recent_gc_times(double end_time_sec, double elapsed_ms); | |
479 | |
480 // The head of the list (via "next_in_collection_set()") representing the | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
481 // current collection set. Set from the incrementally built collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
482 // set at the start of the pause. |
342 | 483 HeapRegion* _collection_set; |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
484 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
485 // The number of bytes in the collection set before the pause. Set from |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
486 // the incrementally built collection set at the start of an evacuation |
6611 | 487 // pause, and incremented in finalize_cset() when adding old regions |
488 // (if any) to the collection set. | |
342 | 489 size_t _collection_set_bytes_used_before; |
490 | |
6611 | 491 // The number of bytes copied during the GC. |
492 size_t _bytes_copied_during_gc; | |
493 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
494 // The associated information that is maintained while the incremental |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
495 // collection set is being built with young regions. Used to populate |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
496 // the recorded info for the evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
497 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
498 enum CSetBuildType { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
499 Active, // We are actively building the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
500 Inactive // We are not actively building the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
501 }; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
502 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
503 CSetBuildType _inc_cset_build_state; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
504 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
505 // The head of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
506 HeapRegion* _inc_cset_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
507 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
508 // The tail of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
509 HeapRegion* _inc_cset_tail; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
510 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
511 // The number of bytes in the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
512 // Used to set _collection_set_bytes_used_before at the start of |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
513 // an evacuation pause. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
514 size_t _inc_cset_bytes_used_before; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
515 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
516 // Used to record the highest end of heap region in collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
517 HeapWord* _inc_cset_max_finger; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
518 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
519 // The RSet lengths recorded for regions in the CSet. It is updated |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
520 // by the thread that adds a new region to the CSet. We assume that |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
521 // only one thread can be allocating a new CSet region (currently, |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
522 // it does so after taking the Heap_lock) hence no need to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
523 // synchronize updates to this field. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
524 size_t _inc_cset_recorded_rs_lengths; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
525 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
526 // A concurrent refinement thread periodcially samples the young |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
527 // region RSets and needs to update _inc_cset_recorded_rs_lengths as |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
528 // the RSets grow. Instead of having to syncronize updates to that |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
529 // field we accumulate them in this field and add it to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
530 // _inc_cset_recorded_rs_lengths_diffs at the start of a GC. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
531 ssize_t _inc_cset_recorded_rs_lengths_diffs; |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
532 |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
533 // The predicted elapsed time it will take to collect the regions in |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
534 // the CSet. This is updated by the thread that adds a new region to |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
535 // the CSet. See the comment for _inc_cset_recorded_rs_lengths about |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
536 // MT-safety assumptions. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
537 double _inc_cset_predicted_elapsed_time_ms; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
538 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
539 // See the comment for _inc_cset_recorded_rs_lengths_diffs. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
540 double _inc_cset_predicted_elapsed_time_ms_diffs; |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
541 |
342 | 542 // Stash a pointer to the g1 heap. |
543 G1CollectedHeap* _g1; | |
544 | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
545 G1GCPhaseTimes* _phase_times; |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
546 |
342 | 547 // The ratio of gc time to elapsed time, computed over recent pauses. |
548 double _recent_avg_pause_time_ratio; | |
549 | |
550 double recent_avg_pause_time_ratio() { | |
551 return _recent_avg_pause_time_ratio; | |
552 } | |
553 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
554 // At the end of a pause we check the heap occupancy and we decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
555 // whether we will start a marking cycle during the next pause. If |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
556 // we decide that we want to do that, we will set this parameter to |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
557 // true. So, this parameter will stay true between the end of a |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
558 // pause and the beginning of a subsequent pause (not necessarily |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
559 // the next one, see the comments on the next field) when we decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
560 // that we will indeed start a marking cycle and do the initial-mark |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
561 // work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
562 volatile bool _initiate_conc_mark_if_possible; |
342 | 563 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
564 // If initiate_conc_mark_if_possible() is set at the beginning of a |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
565 // pause, it is a suggestion that the pause should start a marking |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
566 // cycle by doing the initial-mark work. However, it is possible |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
567 // that the concurrent marking thread is still finishing up the |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
568 // previous marking cycle (e.g., clearing the next marking |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
569 // bitmap). If that is the case we cannot start a new cycle and |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
570 // we'll have to wait for the concurrent marking thread to finish |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
571 // what it is doing. In this case we will postpone the marking cycle |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
572 // initiation decision for the next pause. When we eventually decide |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
573 // to start a cycle, we will set _during_initial_mark_pause which |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
574 // will stay true until the end of the initial-mark pause and it's |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
575 // the condition that indicates that a pause is doing the |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
576 // initial-mark work. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
577 volatile bool _during_initial_mark_pause; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
578 |
4710 | 579 bool _last_young_gc; |
342 | 580 |
581 // This set of variables tracks the collector efficiency, in order to | |
582 // determine whether we should initiate a new marking. | |
583 double _cur_mark_stop_world_time_ms; | |
584 double _mark_remark_start_sec; | |
585 double _mark_cleanup_start_sec; | |
586 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
587 // Update the young list target length either by setting it to the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
588 // desired fixed value or by calculating it using G1's pause |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
589 // prediction model. If no rs_lengths parameter is passed, predict |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
590 // the RS lengths using the prediction model, otherwise use the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
591 // given rs_lengths as the prediction. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
592 void update_young_list_target_length(size_t rs_lengths = (size_t) -1); |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
593 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
594 // Calculate and return the minimum desired young list target |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
595 // length. This is the minimum desired young list length according |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
596 // to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
597 uint calculate_young_list_desired_min_length(uint base_min_length); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
598 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
599 // Calculate and return the maximum desired young list target |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
600 // length. This is the maximum desired young list length according |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
601 // to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
602 uint calculate_young_list_desired_max_length(); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
603 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
604 // Calculate and return the maximum young list target length that |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
605 // can fit into the pause time goal. The parameters are: rs_lengths |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
606 // represent the prediction of how large the young RSet lengths will |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
607 // be, base_min_length is the alreay existing number of regions in |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
608 // the young list, min_length and max_length are the desired min and |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
609 // max young list length according to the user's inputs. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
610 uint calculate_young_list_target_length(size_t rs_lengths, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
611 uint base_min_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
612 uint desired_min_length, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
613 uint desired_max_length); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
614 |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
615 // Check whether a given young length (young_length) fits into the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
616 // given target pause time and whether the prediction for the amount |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
617 // of objects to be copied for the given length will fit into the |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
618 // given free space (expressed by base_free_regions). It is used by |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
619 // calculate_young_list_target_length(). |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
620 bool predict_will_fit(uint young_length, double base_time_ms, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
621 uint base_free_regions, double target_pause_time_ms); |
342 | 622 |
8681
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
623 // Calculate the minimum number of old regions we'll add to the CSet |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
624 // during a mixed GC. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
625 uint calc_min_old_cset_length(); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
626 |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
627 // Calculate the maximum number of old regions we'll add to the CSet |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
628 // during a mixed GC. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
629 uint calc_max_old_cset_length(); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
630 |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
631 // Returns the given amount of uncollected reclaimable space |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
632 // as a percentage of the current heap capacity. |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
633 double reclaimable_bytes_perc(size_t reclaimable_bytes); |
27714220e50e
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
7449
diff
changeset
|
634 |
342 | 635 public: |
636 | |
637 G1CollectorPolicy(); | |
638 | |
639 virtual G1CollectorPolicy* as_g1_policy() { return this; } | |
640 | |
641 virtual CollectorPolicy::Name kind() { | |
642 return CollectorPolicy::G1CollectorPolicyKind; | |
643 } | |
644 | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
645 G1GCPhaseTimes* phase_times() const { return _phase_times; } |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6109
diff
changeset
|
646 |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
647 // Check the current value of the young list RSet lengths and |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
648 // compare it against the last prediction. If the current value is |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
649 // higher, recalculate the young list target length prediction. |
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
650 void revise_young_list_target_length_if_necessary(); |
342 | 651 |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
652 // This should be called after the heap is resized. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
653 void record_new_heap_size(uint new_number_of_regions); |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
654 |
4013 | 655 void init(); |
342 | 656 |
545 | 657 // Create jstat counters for the policy. |
658 virtual void initialize_gc_policy_counters(); | |
659 | |
342 | 660 virtual HeapWord* mem_allocate_work(size_t size, |
661 bool is_tlab, | |
662 bool* gc_overhead_limit_was_exceeded); | |
663 | |
664 // This method controls how a collector handles one or more | |
665 // of its generations being fully allocated. | |
666 virtual HeapWord* satisfy_failed_allocation(size_t size, | |
667 bool is_tlab); | |
668 | |
669 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; } | |
670 | |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
4829
diff
changeset
|
671 bool need_to_start_conc_mark(const char* source, size_t alloc_word_size = 0); |
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
672 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
673 // Record the start and end of an evacuation pause. |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
674 void record_collection_pause_start(double start_time_sec); |
10405 | 675 void record_collection_pause_end(double pause_time_ms, EvacuationInfo& evacuation_info); |
342 | 676 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
677 // Record the start and end of a full collection. |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
678 void record_full_collection_start(); |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
679 void record_full_collection_end(); |
342 | 680 |
681 // Must currently be called while the world is stopped. | |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
682 void record_concurrent_mark_init_end(double mark_init_elapsed_time_ms); |
342 | 683 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
684 // Record start and end of remark. |
4013 | 685 void record_concurrent_mark_remark_start(); |
686 void record_concurrent_mark_remark_end(); | |
342 | 687 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
688 // Record start, end, and completion of cleanup. |
4013 | 689 void record_concurrent_mark_cleanup_start(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
690 void record_concurrent_mark_cleanup_end(int no_of_gc_threads); |
4013 | 691 void record_concurrent_mark_cleanup_completed(); |
342 | 692 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
693 // Records the information about the heap size for reporting in |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
694 // print_detailed_heap_transition |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
695 void record_heap_size_info_at_start(bool full); |
342 | 696 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
697 // Print heap sizing transition (with less and more detail). |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
698 void print_heap_transition(); |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
699 void print_detailed_heap_transition(bool full = false); |
342 | 700 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
701 void record_stop_world_start(); |
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8681
diff
changeset
|
702 void record_concurrent_pause(); |
342 | 703 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
704 // Record how much space we copied during a GC. This is typically |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
705 // called when a GC alloc region is being retired. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
706 void record_bytes_copied_during_gc(size_t bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
707 _bytes_copied_during_gc += bytes; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
708 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
709 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
710 // The amount of space we copied during a GC. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
711 size_t bytes_copied_during_gc() { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
712 return _bytes_copied_during_gc; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
713 } |
342 | 714 |
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
715 // Determine whether there are candidate regions so that the |
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
716 // next GC should be mixed. The two action strings are used |
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4912
diff
changeset
|
717 // in the ergo output when the method returns true or false. |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
718 bool next_gc_should_be_mixed(const char* true_action_str, |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
719 const char* false_action_str); |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4837
diff
changeset
|
720 |
342 | 721 // Choose a new collection set. Marks the chosen regions as being |
722 // "in_collection_set", and links them together. The head and number of | |
723 // the collection set are available via access methods. | |
10405 | 724 void finalize_cset(double target_pause_time_ms, EvacuationInfo& evacuation_info); |
342 | 725 |
726 // The head of the list (via "next_in_collection_set()") representing the | |
727 // current collection set. | |
728 HeapRegion* collection_set() { return _collection_set; } | |
729 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
730 void clear_collection_set() { _collection_set = NULL; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
731 |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
732 // Add old region "hr" to the CSet. |
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4023
diff
changeset
|
733 void add_old_region_to_cset(HeapRegion* hr); |
342 | 734 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
735 // Incremental CSet Support |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
736 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
737 // The head of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
738 HeapRegion* inc_cset_head() { return _inc_cset_head; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
739 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
740 // The tail of the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
741 HeapRegion* inc_set_tail() { return _inc_cset_tail; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
742 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
743 // Initialize incremental collection set info. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
744 void start_incremental_cset_building(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
745 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
746 // Perform any final calculations on the incremental CSet fields |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
747 // before we can use them. |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
748 void finalize_incremental_cset_building(); |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
749 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
750 void clear_incremental_cset() { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
751 _inc_cset_head = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
752 _inc_cset_tail = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
753 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
754 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
755 // Stop adding regions to the incremental collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
756 void stop_incremental_cset_building() { _inc_cset_build_state = Inactive; } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
757 |
4727
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
758 // Add information about hr to the aggregated information for the |
67fdcb391461
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
4710
diff
changeset
|
759 // incrementally built collection set. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
760 void add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
761 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
762 // Update information about hr in the aggregated information for |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
763 // the incrementally built collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
764 void update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
765 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
766 private: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
767 // Update the incremental cset information when adding a region |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
768 // (should not be called directly). |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
769 void add_region_to_incremental_cset_common(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
770 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
771 public: |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
772 // Add hr to the LHS of the incremental collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
773 void add_region_to_incremental_cset_lhs(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
774 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
775 // Add hr to the RHS of the incremental collection set. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
776 void add_region_to_incremental_cset_rhs(HeapRegion* hr); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
777 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
778 #ifndef PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
779 void print_collection_set(HeapRegion* list_head, outputStream* st); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
780 #endif // !PRODUCT |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1359
diff
changeset
|
781 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
782 bool initiate_conc_mark_if_possible() { return _initiate_conc_mark_if_possible; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
783 void set_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
784 void clear_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
785 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
786 bool during_initial_mark_pause() { return _during_initial_mark_pause; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
787 void set_during_initial_mark_pause() { _during_initial_mark_pause = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
788 void clear_during_initial_mark_pause(){ _during_initial_mark_pause = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
789 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
790 // This sets the initiate_conc_mark_if_possible() flag to start a |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
791 // new cycle, as long as we are not already in one. It's best if it |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
792 // is called during a safepoint when the test whether a cycle is in |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
793 // progress or not is stable. |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3868
diff
changeset
|
794 bool force_initial_mark_if_outside_cycle(GCCause::Cause gc_cause); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
795 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
796 // This is called at the very beginning of an evacuation pause (it |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
797 // has to be the first thing that the pause does). If |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
798 // initiate_conc_mark_if_possible() is true, and the concurrent |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
799 // marking thread has completed its work during the previous cycle, |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
800 // it will set during_initial_mark_pause() to so that the pause does |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
801 // the initial-mark work and start a marking cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1356
diff
changeset
|
802 void decide_on_conc_mark_initiation(); |
342 | 803 |
804 // If an expansion would be appropriate, because recent GC overhead had | |
805 // exceeded the desired limit, return an amount to expand by. | |
4013 | 806 size_t expansion_amount(); |
342 | 807 |
808 // Print tracing information. | |
809 void print_tracing_info() const; | |
810 | |
811 // Print stats on young survival ratio | |
812 void print_yg_surv_rate_info() const; | |
813 | |
545 | 814 void finished_recalculating_age_indexes(bool is_survivors) { |
815 if (is_survivors) { | |
816 _survivor_surv_rate_group->finished_recalculating_age_indexes(); | |
817 } else { | |
818 _short_lived_surv_rate_group->finished_recalculating_age_indexes(); | |
819 } | |
342 | 820 // do that for any other surv rate groups |
821 } | |
822 | |
17727 | 823 size_t young_list_target_length() const { return _young_list_target_length; } |
824 | |
1973 | 825 bool is_young_list_full() { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
826 uint young_list_length = _g1->young_list()->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
827 uint young_list_target_length = _young_list_target_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
828 return young_list_length >= young_list_target_length; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
829 } |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
830 |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
831 bool can_expand_young_list() { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
832 uint young_list_length = _g1->young_list()->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
833 uint young_list_max_length = _young_list_max_length; |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
834 return young_list_length < young_list_max_length; |
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
835 } |
1973 | 836 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
837 uint young_list_max_length() { |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
838 return _young_list_max_length; |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
839 } |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
840 |
4710 | 841 bool gcs_are_young() { |
842 return _gcs_are_young; | |
342 | 843 } |
4710 | 844 void set_gcs_are_young(bool gcs_are_young) { |
845 _gcs_are_young = gcs_are_young; | |
342 | 846 } |
847 | |
848 bool adaptive_young_list_length() { | |
4729
1cbe7978b021
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
4727
diff
changeset
|
849 return _young_gen_sizer->adaptive_young_list_length(); |
342 | 850 } |
851 | |
4013 | 852 private: |
342 | 853 // |
854 // Survivor regions policy. | |
855 // | |
856 | |
857 // Current tenuring threshold, set to 0 if the collector reaches the | |
6818 | 858 // maximum amount of survivors regions. |
859 uint _tenuring_threshold; | |
342 | 860 |
545 | 861 // The limit on the number of regions allocated for survivors. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
862 uint _max_survivor_regions; |
545 | 863 |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
864 // For reporting purposes. |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
865 // The value of _heap_bytes_before_gc is also used to calculate |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
866 // the cost of copying. |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
867 |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
868 size_t _eden_used_bytes_before_gc; // Eden occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
869 size_t _survivor_used_bytes_before_gc; // Survivor occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
870 size_t _heap_used_bytes_before_gc; // Heap occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
871 size_t _metaspace_used_bytes_before_gc; // Metaspace occupancy before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
872 |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
873 size_t _eden_capacity_bytes_before_gc; // Eden capacity before GC |
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
10098
diff
changeset
|
874 size_t _heap_capacity_bytes_before_gc; // Heap capacity before GC |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
2430
diff
changeset
|
875 |
6818 | 876 // The amount of survivor regions after a collection. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
877 uint _recorded_survivor_regions; |
545 | 878 // List of survivor regions. |
879 HeapRegion* _recorded_survivor_head; | |
880 HeapRegion* _recorded_survivor_tail; | |
881 | |
882 ageTable _survivors_age_table; | |
883 | |
342 | 884 public: |
10405 | 885 uint tenuring_threshold() const { return _tenuring_threshold; } |
342 | 886 |
887 inline GCAllocPurpose | |
6818 | 888 evacuation_destination(HeapRegion* src_region, uint age, size_t word_sz) { |
342 | 889 if (age < _tenuring_threshold && src_region->is_young()) { |
890 return GCAllocForSurvived; | |
891 } else { | |
892 return GCAllocForTenured; | |
893 } | |
894 } | |
895 | |
896 inline bool track_object_age(GCAllocPurpose purpose) { | |
897 return purpose == GCAllocForSurvived; | |
898 } | |
899 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
900 static const uint REGIONS_UNLIMITED = (uint) -1; |
545 | 901 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
902 uint max_regions(int purpose); |
342 | 903 |
904 // The limit on regions for a particular purpose is reached. | |
905 void note_alloc_region_limit_reached(int purpose) { | |
906 if (purpose == GCAllocForSurvived) { | |
907 _tenuring_threshold = 0; | |
908 } | |
909 } | |
910 | |
911 void note_start_adding_survivor_regions() { | |
912 _survivor_surv_rate_group->start_adding_regions(); | |
913 } | |
914 | |
915 void note_stop_adding_survivor_regions() { | |
916 _survivor_surv_rate_group->stop_adding_regions(); | |
917 } | |
545 | 918 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
919 void record_survivor_regions(uint regions, |
545 | 920 HeapRegion* head, |
921 HeapRegion* tail) { | |
922 _recorded_survivor_regions = regions; | |
923 _recorded_survivor_head = head; | |
924 _recorded_survivor_tail = tail; | |
925 } | |
926 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
927 uint recorded_survivor_regions() { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
928 return _recorded_survivor_regions; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
929 } |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
794
diff
changeset
|
930 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
5988
diff
changeset
|
931 void record_thread_age_table(ageTable* age_table) { |
545 | 932 _survivors_age_table.merge_par(age_table); |
933 } | |
934 | |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
935 void update_max_gc_locker_expansion(); |
1991
016a3628c885
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
1973
diff
changeset
|
936 |
545 | 937 // Calculates survivor space parameters. |
3919
4f41766176cf
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
3914
diff
changeset
|
938 void update_survivors_policy(); |
545 | 939 |
13060
8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
13059
diff
changeset
|
940 virtual void post_heap_initialize(); |
342 | 941 }; |
942 | |
943 // This should move to some place more general... | |
944 | |
945 // If we have "n" measurements, and we've kept track of their "sum" and the | |
946 // "sum_of_squares" of the measurements, this returns the variance of the | |
947 // sequence. | |
948 inline double variance(int n, double sum_of_squares, double sum) { | |
949 double n_d = (double)n; | |
950 double avg = sum/n_d; | |
951 return (sum_of_squares - 2.0 * avg * sum + n_d * avg * avg) / n_d; | |
952 } | |
953 | |
1972 | 954 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP |